I have just purchased a JBL PB12, and I would like to know if anyone reading this has one of these subs and is happy with it. I *cannot* spend more than $300 on a sub at this time, so please, nobody try to sell me an SVS. I'm sure that they're better than this one, but I don't have the cash, or the living conditions (I live in a townhouse with neighbors on both sides) to justify saving up for an SVS. I believe the capabilities of such a sub would be wasted. I am upgrading from the Sub that came with my Kenwood HTB 504, so I'm certain that I'll notice a difference. Any tweaks PB12 owners can recommend? Should I buy a slab to put it on? Or, is there any other subs that would compete with the PB12 that are $300 or less? How about that Sony model?